Birch Hollow is a challenging 3. A III canyon. 8 rappels for a slot canyon experience when tackled by qualified and skilled individuals. The longest rap is 120 feet (40m).
Birch Hollow is near Zion National Park, and accessible from North Fork Road (East Zion) past the Ponderosa Resort. If you do not hike out through Orderville into Zion National Park (ZNP) and the Narrows, then a ZNP Permit is not required (turning around and hiking back to your vehicle).
The time commitment is about 4 to 6 hours if exiting upstream to your vehicle at the Trailhead, or 8 to 12 hours if descending downstream through Orderville to the ZNP Narrows with a Permit.
Be prepared for multiple challenges, including rappelling, stemming, down-climbing, tying proper knots, assessing anchor points, and it's a good idea to bring gear to replace webbing and quick links if necessary (sandstone color preferred).
